Home / 3,931.04-5,413.56-3,231.20

Finding the Fourth Proportional to 3,931.04, 5,413.56 and 3,231.20

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Solution

The fourth proportional to 3,931.04, 5,413.56 and 3,231.20 is: 4,449.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.04 : 5,413.56 = 3,231.20 : x
  2. Step 2: Convert to fraction form
    3,931.04/5,413.56 = 3,231.20/x
  3. Step 3: Cross multiply
    3,931.04x = 5,413.56 × 3,231.20
  4. Step 4: Simplify right side
    3,931.04x = 17,492,295.07
  5. Step 5: Solve for x
    x = 17,492,295.07/3,931.04
  6. Step 6: Final answer
    x = 4,449.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.